Method and apparatus for forming an interiorly-beaded or looped tearing-strip can



Oct 30, 1928. 1,689,605

- G. F. WALTER METHOD AND APPARATUS FOR FORMING AN INTERIORLY BEADED OR LOOPED TEARING STRIP CAN Filed March 17, 1926 4 Sheets-Sheet 1 INVENTOR A576 BY CM ATT NEY Oct. 30, 1928. 1,689,605

6. F. WALTER METHOD AND APPARATUS FOR FORMING AN INTERIORLY BEADED 0R LOOPED TEARING STRIP CAN Filed March 17, 1926 4 Sheets-Sheet 2 INVENTOR Oct 30, 1928. 1,689,605

G.F,VVALTER METHOD AND APPARATUS FOR FORMING AN INTERIORLY BEADED OR LOOPED TEARING STRIP CAN Filed March 17, 1926 4 Sneets-Sheet 5 Get 30, 1928. 1,689,605

' G. F. WALTER METHOD AND APPARATUS FOR FORMING AN INTERIORLY v BEADED OR LOOPED TEARING STRIP CAN Filed March 17, 1926 4 Sheets-Sheet 4 INVENTOR $0M p ATTNEY the type of containers hereinbefore referred Patented OctJO, 1928. p

UNITED STA-TE SIPATENT OFFICE- enonon FREDRICK WALTER, or BROOKLYN, NEW YORK,- ASSIGNOR 'ro AMERICAN I CAN'- COMPANY OF NEW YORK, N. Y.; A CORPORATION OF NEW YORK.

mnrnon AND APPARATUS ron FORMING AN INTERIORLY-BEADED on LOOPED mEAnrNG-srmr CAN. 4

Application filed March 17,1926. Serial No. 95,272.

My invention relates to a method and "apparatus for forming an interiorly beaded or looped tearing strip can. j The invention disclosed in the drawings -5 and described in thespec-ification of this application refers to the manufacture of a metal container, made according to the invention of John M. Young, which is the subject matter of a U. S. .Patent No. 1,586,277. In this particular form of metal containera portionof the container Wall-is or may be bent inwardly and upwardly in a looped or other similar form of construction to provide an interior friction wall seat for,

an associated interior friction plug formed on the container cover, and utilized as a frie tion element after the tearing strip which is embodied in the container wall about the loop portion has been removed. In this type of container the cover is hermetically sealed to the upper part of the container and this construction forms a hermetic closure. The tearing strip is defined by, scored lines and provided with an extended tongue which n is engaged by the ordinary opening key to remove the tearing strip from'the container wall by tearing the same along the score lines. After the tearing strip has been removed, the cover element is used as a reclosure,-the construction of-the cover permitting its frictional engagement into the looped portion of the container.

In manufacturing a container of this type it is highly'essentiafthat the inner diameter pressed looped portion of the inwardly which forms the frictionwall seat be properly sized to correctly engage the cover member whenthe same is used as a reclosure.

One of the objectsof my invention resides in providing a more simple method and apparatus than is disclosed in my prior applications for properly sizing this inwardly pressed looped portion toan exact diametral dimension throughout its entire circumference whereby an effective frictional wall for the seating of the reclosing member. is:

secured. I

Yet another object of my invention resides in providing a simple and inexpensive method and apparatus for manufacturing to, in a manner which lends itself to high speed production of relatively few operations and inan eficient manner by simul taneously accomplishing the collapsing and sizing operations of the beaded wallof the can. I

Still another object of my invention resides in the provision of a method and apparatus for the manufacture of containers as heretofore described, and particularly in the method and devices for forming looped'wall portions in the can walls of varying outlines and shapes.

' further obgect resides in the provision of a novel apparatus for holding the can body during the loop formin 'operation and for e ectingthe can body From the apparatus thereafter.

Numerous other objects and advantages: of I the invention will be apparent as it is better understood from'the following description,

, which, taken in connection with the accompanying' drawings, discloses a preferred embodiment thereof. v v

Reference should-be had to thedrawings,

whereinr "Fig. 1 is a perspective view ofa type of container adapted tobe formed according to my invention.

Fig. 2 is a longitudinal section through a,

portion of a beading device, the view illustrating a container body in position and beingi operated upon.

ig. 3-is a partiahlongitudinal elevation and cross-sect on through a collapsing and sizing inachine, the-view illustrating the first or initial position of the container within the collapsing and sizing mechanism.

Fig. 4 is aview similar to Fig. 3 illustrating a further step in the collapsing operation.

' Fig. 5 is a View similar to Fig. illustrating the beginning of the discharge movement of the parts ofthe collapsing and sizing machine.

Fig. 6 is a view similar to Fig. 3,"illustratin the container after discharge from the co lapsmg and sizing mechanism.

- Fig. 7 ma cross-sectional view of a portion of the collapsingand sizing machine, the

view being taken substantially along the line 7-? of Fig. 3.

Fig. 8 is a cross-sectional view of a portion 4 'of the collapsing and sizing machine, the

view "being taken substantially along the line 8 8 of Fig. 3.

Fig. 9 is a frag-mental sectional detail of s I trating the position of the container previous collapsing mechanism, illusportion of the to the collapsing operation.

Fig. 10 is a view similar to. Flg. 9 illustrating the container body after the collaps i'ngoperation and with certain parts oi: the

1 collapsing and sizing machine being held in one o'sition to form a flattened double loop in tile container body. 1 Fig. 11 is a view similar to Fig. 1, illustrating a container in position after the collapsing operation has been performed,; this view illustrating the relative position of operating parts of the collapsing and sizing machine whereby'a form of looped' beadis obtained, this being different from the form of the loop illust'rated in Fig. 10.

- cylindrical Referring more in detail to the drawings and particularly tQZFig. 1, the numeral 10 indicates a hollow contalner body of a or other form,prov ided with the ordinary side seam 11, and circumferentially 'scored lines 12 setting off a tearing strip 13, and further provided with directing score lines. 1-1 arranged at an angle to; the score lines 12. The said tearing strip 13 termi nates in the tongue to' form an inwardly and upwardly extending loop 21, connecting with adownwardly and outwardly extending loop 22, formed in the container wall adj aeent and-beneath the tearing strip 13. The inner diameter of the looped portion 21 is correctly sized to securely sink 18 after the tearing stri shaping it to c [engaging the lar side seam engage the outer diameter of the counter- J is removed and. when the cover memberll is used as a reclosure for the opened container 10. f

.In forming the particular elem'ents described in this container and shown in Fig. 1, it is necessary to first-form the container body 10 in the regular mannerby properly lindrical or other form and e ges of the blank in the re'gu- 11. This cylindrical or other. formed body 11) is then pressed in a beading machine where the first-operation of forming the looped construction is accomplished. The forming of. the first operation. or bead on the containerpart is clearly illustrated" The beading mechanism consists of an inv 'ner beading roller 23 rotatably mounted on a stud 24 eccentrically' secured to the end of a shalt 25, 'eccent'ri'cally 'ournalled in 'a sleeve '26 rotatable within a s ell 27 A hollow cup member 28 is threaded fixedly to the annular opening the shell 27 extends the same as clearly illustrated in Fig. 2. In vformed v.in the outer part of the shell there is disposed a ring 29 secured to the cup member28 by means of screws 30, passing through a hardened steel washer 31 overlying 26 and spaced therefrom. The ring 29 1S formed with an inwardly extended annular ridge 32 adapted to'-.cooperate at certain periods with an annular groove 33 formed in -the roller 23, as clearly illustrated in Fig.2.'.

The formed lin'drical container body 10 is inserted within the beading devicebybeing positioned'withits scored end against the washer 31, it being understood that the sleeve 26- and the shaft 25 are moved relative 'to one another, in order, by reason of beyond the end olf the end of the sleeve the eccentricity of each of those members, to e a position the roller 23 centrally of the ring 29. and 'awayirom the inner wall of the ring 29. "After the container body-1'0: has-thus been positioned the shaft 25 and the sleeve 26 are both slightly rotated ler 23 toward the inner wall of the ring 29,

to force the rolasillustrated in Fig. 2. In this position the roller 23. engages the inner diameter of the 5 'container body and the groove 33 of the said roller forces the material offthe contamer wall against the annular ridge 32 of the ring 29 and causes that part of ,the container wall to conform to the shape of the ridge 32 and the groove 33. While the sleeve 26 and the shaft is then held in fixed position the shell 27 carrying the cup member 28 and the ring 29 is then rotated,

which actionicausesthe ridge 32,to contactv the entire circumference of the container body 10 in a circularapath oftravel, and

this action by reason of the cooperation of which works upon the stud 24 the roller 23 forms an inwardly pressed bead 35' into the upper wall of the container body 10 adjacent the tearing strip 13,

Afterthe groove 35 has been formed en" 1" tirely around v sleeve 26 and the shaft 25 are moved to cause the roller 23 to move inwardly fromits positionadjacent the ring 29 and thus tov free the said container body 10. The

formed and now-beadedconta-iner body is then removed from the heading machine.

The next machine used in the formation of the looped head of the container 10 is a collapsing and sizing machine, this being clearly illustrated in Figs. 3 to 8 inclusively. This collapsin and sizin machine consists of a clampingh 37 normally spaced'from each other so that the formed and headed container body. 10 can be positioned between the inner ex tremities of the two head members. As viewed in Fig. 3 of the drawings the clamphead is illustrated on the left hand ead 36 an a collapsing head 12.5.

the container body'10 the I the clamp fingers 42. By this constructionof the drawing while the collapsing :"head 37 is positioned to the right and in axial alinement with the saidclamping head 36. The container 10 is positioned between the two heads, as clearly illustrated in Fig.

3. The clamping head 36 consists of a hold ing pad 38 threadedly secured to one entremity of a sliding shaft-39 moving horizontally in a stationary frame 40. The said holding pad 38 is provided'with a, ver tioal slot 41, as illustrated in Figs. 3 and 8, in which are positioned two clamp fingers 42.

The said .fingers 42 are normally held. out;

wardly by a coiled spring 43 positioned in a vertical bore 44 formed in each clamp finger 42. Each clamp finger 42 is held from lateral displacement .byimeans of a plate 45,'secured by screws 46 to the forward face of the holding pad 38, slots 417being formed in the said plate to. accommodate radial movement of the clam fingers 42 are held outwardly under the tension of the spring 43, and are held for movement within the guideway 41 by. the plate 45 see Fig. 8), The outer face of each clamp nger 42' is formed with an 'inclined face 47, as clearly illustrated in Figs. 3 and 5. The plate 45 is formed with a corresponding tapered face 48, as illustrated in Fig. 6, and this construction in connection with the inclined face of the, clamp fingers 42 permits easy positioning of one 4 end of the formed andbeaded container body 10 over the end of the plate 45, the inclined face 48 of the same guiding the container body 10 into the position shownv in Fig. 3. The clamp fingers 42 at such time are moved inwardly against the tension of ,the spring 43 "to permit the positioning of the said eon tainer body over the ends of the said fingers. By reason'of the tension of the spring 43 thecontainerbody- 10 is thus securely held about the plate and under the clamping action of the fingers 42.

The collapsing head consists of a support ring '49 secured by bolts .50 to'a stationary framebl, positioned opposite the frame 40.

The inside diameter of the support ring 49 is just sufficient to accommodate the scored end of the-formed and beaded container body 10, as clearly illustrated in. Fig. 3. Upon the said container body being positionedinto the clamping headi36. as just described the lapsing die is carried upon a sliding hollow shaft 54, which is adapted to be operated by a suitable connection not shown. Slidably positioned withintlie hollow shaft 54 is a sliding shaft 55,'actuated by a suitable connection not shown, the inner extremity of the said shaft 55 being threadedly connected to-a forming and sizing disc 56, the outer diameter of which is of sufiicient size to engage the inner diameter of the head 35- formed in the container body 10. The forward outer edge of the 'said forming disc 56'is rounded as at 57 to permit easy insertion of the disc 56 within the container groove 35, during the collapsing operation.

.With the clamping head 36 and the collapsing head 37 in the position illustrated in Fig. 3 the container body 10 is firmly held between the'face of the holding pad 38 connected with the clamping head 36 and the face of the collapsing die 52, connected with the collapsing head 37. Reforming of the bead 35 in the collapsing operation takes lace by reason of movement of the collapsmg die 52 the same being moved toward the left by movement of the hollow shaft 54. Inasmuch as the groove 35 forms the weakest part of the container wall the said groove must give Way under the collapsing action. Previous to the movement of the'colla psing side of the inner diameter of the'groove35 of the container 10, thisposition being illustrated in Fig. 3. The particular form taken by the groove 35 of the container body 10 is dependent upon the relative movement between the disc 56 and the collapsing die 52 during the collapsin operation; If the loopedform illustrate in Fig. 1 of the draw ings is desired, this being the form illustrated in the patent to Young previously. referred to, the forming and sizing disc 56 is held in a stationary position during the movement of the collapsing die 52. 'This resulting form .of loop 58 and the relative position of parts of the collapsing head 37 after the collapsing action, is illustrated in .die 52 the disc 56 has been inserted on the in- Fig. 4 of the drawings. Variations in the shape of the loop Wlll be more fully set forthafter the full operation of the collapsing and sizing machine has been described.

After the double loop 58 has been fully llU formed the collapsing die 52 is moved toward the left, as viewed in Figs. 3, 4 and 5, carrying the container body 10 from within the support ring 49 and'stripping the bead'58 off of the outer surface of the disc 56, this final'position being illustrated in Fig. 5. Simultaneously with the movement of the collapsing die 52 the shaft 39 carrying the A stripper ring 59 is provided with an annular flange 60, positioned over the small diameter of the holding pad 38, as clearly illustrated in Figs. 3 and 6. The said stripper ring 59 is retained in position surroundagainst the edge of the container body 10,;

ing the pad- 38 by means of awasher'fil secured by screw's62 to the back facejof the holding pad-38. Projecting fingers as are extended from the face of the stripper ring 59 and these fingers operate in gslots' 64 formed in the forward flange of. the-holding pad 88 and extremityof each of the' fililampfii'igers m.

The forward face of the fingers 6'3 normally projects in a plane with the forward face of the holding pad 38 and in this position rests (see Figs. 8 and -Aftcr the clamping head 36 is moved toward the left preparatory to stripping thecontainer body from the collapsing and sizing mechanism the rear face of the stripper ring- 59 first strikes against the frame 40, this position being shown. in Fig. 5. The container body 10 is .then completely released-'fromthe-holding device in the collapsing mechanism by the simultaneous retraction of the collapsii'ig die '52 moving toward the right and by the movement of the holding pad 38 and clamping fingers 42 toward the left, this action being a complished through the medium of the shaft 39. Inasmuch as the stripper ring 'Inthe machine of my presentinvention, by a simple change in relative movement between certain parts I, am able to control atv will the particular shape of the loo ed construction without adding any furt er mechanism or without interfering in any way with f the resulting friction wall seat formed in the container body.

As clearly shown in Figs. 9, 10 "and 11 the shape of the particular loop formed by the collapsing action can be varied according to the relative movement of the forming and sizing disc 56 and the collapsing die 52 dur-- ing the collapsing operation. -As shown in Fig. 9 the container body10 is inserted .in

the regular way, the forward face ofthesupporting ring being in line substantially with y the forward face of the sizing disc which has been moved by the shaft 55 prior to the movement of the die 5 to. position on the mterior of the lnner .(llZLIIlOtCI' of the groove 35 of the container 10. If upon movement of the die 52 the disc-56 is moved a slight distance, so that its forward face projects beyond the forward face of the supslight'ly I 19, the form of loop produced is port rm g vof a symn'ietrical double loop shape, illustrated at 66 in Fig. 10.-

If on the other hand, the disc56 is inoved forward in unison with the travel of the col-.

lapsing die 52 S gma! the forward face of in slots 65 formedinihe outer the disc 56 projects at a greater distance in front of the face of thesup'port rmg 4t),

rectly opposed to the loop formed in the first described mannenand shown in Fig. 1.

It should be-evident that any intermediate "shape of'the-loop can be obtained by changing the. relative; -travel of the loop forming the resulting loop 67 (Fig. 11) is one d1 i and sizing disc 56 and the collapsing die 52.

7 It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, andit will be apparent that various'changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention orsacrificing all of its materialadvantages, the form herembefore described being merely a preferred embodiment thereof. I claim:

'1. In an apparatus of the character de-.

scribed, the combination of a support, a

clamping head comprising a holding member, means for shifting the same, clamping lingers carried by said holding member and arranged to receive the can body end thereover and to hold the samerigidly and a stripping member carried by said. clamping head, and movable relativelytheretog said stripping'member havlng means for engag-i ingthe eanbody end andforcing it from said clamping fingers.

.2. In an apparatus of the character de scribed, the combination of a support, a

clamping lieadcomprising a holding member forming a shoulder to receive acan body end, means for shifting said clamping head,

clamping fingers carried by said holding body end thereover and to hold, said end rigidly against said-shoulder anda stripper member mounted on said clamping head and shiftable relatively thereto said member including a plurality of fingers adapted to engage the can body end and eject it from said clamping head. i 3.'I'n an apparatus of the. character demember and arranged to receive the can] scribed, the combination of a support, a collapsinghead and forming disc adapted to receive therebetween a canbody end with a peripheral bead, a die havinganannular seat for said can body end, a clampiirg head havinga holding member provided with spring pressed fingers and 'a' shoulder adapted to receive the opposite end of said can to hold the same, a stripper ring on said clamping head, and means for shifting said die and clamping head for'deforming said head and forv stripping said can from said collapsing head and clamping head.

' 4. The method of forming an inwardly looped wall in a cylindrical wall, comprise] ing subjecting a cylindrical wall, while held against outward bending, to endwise pressure while maintaining a predetermined C11- distance apart.

cumfercntial zone thereof between concentrically disposed dies maintained a fixed 5. The method of forming an inwardly looped wall in a cylindrical wall, comprising forming a peripheral bead in the container .Wall and .collapsing the. bead by endwise pressure while simultaneously holding the wall from outward bending and limiting the inward bending ference, i

6. The method of forming a looped wall in a cylindrical wall comprising forming a peripheral bend in the container wall, holding said wall from outward bending, and collapslng the bead against an. unyiel'dmg cir- ,cular wall of ,an exact circumference while controlling movement of the bead wall n" other directions.

"7." The method of forming a looped wall in a cylindrical wall comprising forming a peripheral bead in the wall of a container, and collapsing the bead between concentri cally spaced apart'rigid'die surfaces and bending the collapsed head toward the end of said wall.

8. The method of forming a looped wall in a container wallcomprisingcollapsing a preformed peripheral bead inthe container wall by endwise pressure on the container wall while' maintaining the bead against an inner circumferential wall of predetermined diameter whereby to form a wall portion of said collapsed bead of such predetermined diameter and bending said collapsed bead toward the endof the container. A

- 9. The method of forming a looped wall in a cylindrical wall comprising "subjecting a cylindrical body wall to endwise pressure while maintaining a predeterminedcircumferential zone thereof between concentrically disposed dies maintained a fixed distance apart, and" causing the inner die to move endwise relatively to the pressure means during such endwise pressure.

10. The method of forming a looped wall" in a cylindrical wall comprising forming a.

container wall within an inwardly projecting bead, deforming the head so as to restr ct radially inward movement thereof, whlle causing predetermined endwise bending of the bead wall to form a looped wallof desired shape. r

11. The method of forming a looped Wall in a cylindrical wall comprising forming a periphereal bead in a containerwallsubjecting the container wall to endwise pressure while disposing the head between two concentric die surfaces, maintained a predetermined distance apart, but movable relatively in parallel planes, and. controlling such relative movement of said die surfaces and of the pressure means to determine the shape of the looped portion formed.

12. The method of forming a looped wall to a predetermined circum in' afcylindrical wall-comprising forming a peripheral bead in a container wall, subjecting the container wall to endwise pressure while disposing the bead between two concentric die surfaces maintained a predetermined distance apart and thereby forming a loop. in said wall and bending said loop toward one end. of the can.

13. In an apparatus of the character described, the combination of a support, for

fholding a cylindrical body having a peripheral head in its wall, means for subjecting the container wall to endwise pressure and forminga loop therein and means for simultaneously shaping the loop to a predetermined circumferential dimension and inclining it toward the end of said body.

4 14. In an" apparatus of the character described, the combination of a support for supporting a cylindrical body having a pcripheral head between two concentric die surfaces spaced apart, means forsubjecting the body wall to endwisepressure and means for causing theinner die surface to move relatively to said, pressure means.

15. In an apparatus of the character described, the combination of a support, an -outer stationary ring forming a die, a formi-n'g means concentrically disposed within said ring-and spaced from its inner circumference, a die concentrically disposed in said space and movable therein, said die having .an annular groove to receive a cylindrical wall of a body having a peripheral bead adapted to lie insaid space between said ring and forming means, and means for shifting provided with a seat for the cylindrical wall of the container bodyand means for shifting said die relative .to said forming means to subject the body wall to endwise pressure so as to deform and loop the body wall in the space between said ring and forming means.

17. In an apparatus of the character described, the combinationof a support, means comprising concentric die surfaces maintained a fixed distance apart, means for rigidly supporting a cylindrical body with a predetermined circumferential zone thereof'disposed between said d1e surfaces and meansfor exerting predetermined, endwise pressure on the body wall to deform the wall between said surfaces, and to bend the deformed part of the wall toward the end of said cylindrical body.

18, In an apparatus of the character described,the combination of a support, a coling head and spaced therefrom, said disc I i I for the can end, said. die having a tubular shaft concentrically surrounding the -'disc and means for-shifting said forming 19. In an,

scribed, the combination of a support, a

clamping head adapted ofsaid disc and means for moving said- I shafts. .7 f

20: The method of forming a looped friction seal seat in apyli'ndrical container wall comprisingcollapsing a single loop bead formed in the-wall of'a container'by sub- 3 cting the container wall to'endwise pres: sure, while maintaining the'bead between concentrically 'spaced apart rigid die surfaces and causing said die surfacesto move relatively in' parallel planes to reshape said bead into a' double looped bead of predetermined shape and dimension, 7

21. The'l ethod of forming a looped friction seal se t in a cylindrical container wall comprising forming a containerwa'll with an. j inwardly projecting single bead and deform in'g said head and restricting radial inward lapsing head mounted thereon, a forming disc concentrically disposed .thereon and s aced from the inner wall of said head to orm an annular seat for the can wall and can bead,v a die concentrically disposed in saidv space'andhaving an annular groove to receive the end of the can wall, a rigid support for the opposite endof the can wall, means for shifting said die relative to the forming pparatus of the character deior rigidly holdingon'e end of the can body, a collapsing head, a-formingdisc disposed concentrically. in said collapshaving a shaft forshifting saiddisc, a die to move in the space between said head and disk and having an annular seat double looped seat portion of predetermined dimension infs'aid containerwall. shaft GEORGEFREDRICK'WALTER.

movement thereof, whereby to produce a 

